Texas Instruments TI-89 User Manual - Page 812
In Degree angle mode, In function graphing mode and, window, column vectors.
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4DMS MATH/Angle menu expression 4DMS list 4DMS matrix 4DMS Interprets the argument as an angle and displays the equivalent DMS (DDDDDD¡MM¢SS.ss£) number. See ¡, ', " on page 910 for DMS (degree, minutes, seconds) format. In Degree angle mode: 45.371 4DMS ¸ 45ó 22'15.6" {45.371,60} 4DMS ¸ {45ó 22'15.6" 60ó } Note: 4DMS will convert from radians to degrees when used in radian mode. If the input is followed by a degree symbol ( ¡ ), no conversion will occur. You can use 4DMS only at the end of an entry line. dotP( ) MATH/Matrix/Vector ops menu dotP(list1, list2) ⇒ expression Returns the "dot" product of two lists. dotP(vector1, vector2) ⇒ expression Returns the "dot" product of two vectors. Both must be row vectors, or both must be column vectors. dotP({a,b,c},{d,e,f}) ¸ aø d + bø e + cø f dotP({1,2},{5,6}) ¸ 17 dotP([a,b,c],[d,e,f]) ¸ aø d + bø e + cø f dotP([1,2,3],[4,5,6]) ¸ 32 DrawFunc CATALOG DrawFunc expression Draws expression as a function, using x as the independent variable. Note: Regraphing erases all drawn items. In function graphing mode and ZoomStd window: DrawFunc 1.25xù cos(x) ¸ DrawInv CATALOG DrawInv expression Draws the inverse of expression by plotting x values on the y axis and y values on the x axis. x is the independent variable. Note: Regraphing erases all drawn items. In function graphing mode and ZoomStd window: DrawInv 1.25xù cos(x) ¸ 812 Appendix A: Functions and Instructions